Metal cutter and punch



(No Model.)

W. SMITH. METAL CUTTER AND `PUNCH. 11o. 450,599. Patented Apr. 14,1891( Off/Ilflrfl 3 s moowsu To all whom it may concern:

Y i Nin l VILLIAM SMlTI-I, OF BOSTON, MASSACHUSETTS.

v METAL CUTTER AND PUNCH.

SPECIFICATION forming part of Letters Patent No. 450,599, dated April 14, 1891.

Application filed August 30, 1890. Serial No. 363,565. (No model.) b

Be it known that I, XVILLIAM SMITH, a citizen of the United States, residing at the city o f Boston, in the county of Suffolk and State of Massachusetts, have invented a new and Improved Metal Cutter and Punch, of which the following is a specification.

VThe nature of my invention is that of a pair of metal shears supported on a platform or a bench and operated by a handle which works above the upper shear-blade, which handle is supplemented by another handle working (from below the place of the meet-ing of the blades) also upon the upper blade, (by means of appropriate connections,) with which is combinedat the back part of the tool a punch, also worked by either the single handle or by the two handles combined; and

theobject is to furnish a device for cutting metal plates of any width with a power graduated'to the `resistance offered, and with the same tool to'punch in the pla-tes holes of varying sizes.

` In the drawings, Figure l is a side view of fully explained.

my device. Fig. 2 is a view from the lefthand end of that part of Fig. 1. Figs. 3,4, 5, and G are views in vertical section of some minor details ofFig..1, and are hereinafter E, Fig. l, is the platform (A vIn the drawings,

p bench or a shelf is sometimes used.)

F FF, Fig. 1, is the standard, being a slab of iron, of shape as seen, placed on edge and fastened by braces and screws (one is seen at G,-Fig. 1) to the platform E. 'lhe lower part of the standard at the left-hand end (see Fig. l) 1s shaped into a geared segment of a circle whose center H is the point of rotation of the horizontally-disposed bar H, Figs. 1 and 2, which bar is called the lower-lever-holding bar, as its left-hand end is held by a pin passing horizontally through it and through the lower end of the lower lever7 J, Fig. 1, which lever J is thus held by the pin KX with the geared portion of a circle K (fitting to and gearing with the geared segment (already referred to, of the standard F, at its lower end,

in gear with the said (see Figs. 1 and 2,)

This lower lever J 1s seen standard-segment.

in Fig. 2 to be bent at the left-hand side of the standard F (in practice to the distance of, say, two inches) and to proceed upward.

This is in order that when the levers are in operation the lower lever shall not interfere wlth the working of the upper lever, and in this case I sometimes, of course, remove the upper cutter-connecting bar V. f L, Fig. 1, is the upper lever.7 This is made similarly to the lower lever, carryinga similar geared portion of a circle M, Fig. 1, (l sometimes dispense with the geared arrangement and use a simple pin and a cam,) and is borne by two curved bars of iron', (one is seen in Fig. 1, N,) called the upper-lever holder, which latter is firmly fastened to and held by the upper cutter-bar P, Fig. 1, to the extreme (left-hand) end of which it is attached. This upper cutter-bar is iiush with the face of the standard F on the farther side, and on the hither side at the right hand has a piece of iron PX, of the same thickness with the cutter-bar, welded to it, (see Fig. 1,) by means of which the cutter-bar partially rotates on vthe bearingpin7 Q, Fig. 1, which pin is borne by the standard F on the farther side and on the hither side by the upper cutter-brace R, Fig. 1. (See also Fig. 5.) S, Figs. 1 and 5, is called the pressure-pin, and is a pin fastened to the standard F and protruding through a curved slot in the bar P, the slot in the bar P moving on it loosely. The function of this pin is to fortify the bearing-pin Q against any fortuitous eXtra strain in cutting thick iron. The upper cutter-bar carries the upper cutter-bladev T, Fig. 1, (and 4,) which is fastened to it by screws, as'seen in Fig. 1. The lower cutter-blade U, Fig. 1, is similarly screwed to the standard F. Y 'v V, Fig. 1, is a bar called the upper-cutterconnecting bar, which is attached by a pin y to the upper cutter-bar P, near to the lefthand end of the latter. bar V is attached to the pin KX, on whichit plays loosely. (See Fig. 2.)

W, Figs. 1 and 3, is the strengtheningbar, and is attached at its lower end to the lower part of the standard F, near the lefthand end of the same, and at its upper end to the upper arm of the standard F. The function of this bar W is to connect the upper and lower arms of the standard F, and thus to counteract the effect upon the arms of any At its lower end the y IOO excessive strain. I sometimes fasten this strengthening-bar N with two screws and nuts on the farther side of the device, thus ing holes in iron, dac.

X X, Fig. l, is the hither sideof a frame of two similar pieces of thick sheet-iron, set up edgewise, of shape as seen, and fastened by three (more or less) screws to the upper arm of the standard F. A space is cnt away (as seen) at the point Y, which, when the tool is in use, admit-s the insertion horizontally of the metal into which a hole is to be punched. Between the two sides X X, as seen in horizontal section in Fig. 6 and in vertical section in Fig. l of the frame,and supported as seen in Fig. 4, is a block of metal Z, perforatedin the center, as seen in Fig. 4, and called the die. Above the open space Y, Fig. l, is seen at the left-hand side a rounded protuberance BX, shown in the horizontal crosssection view of Fig. 6 to form nearly a full circle. This is of iron and bears (see dashed lines in Fig. 6) a hole A", running perpendicularly, as seen in dashed lines in Fig. l, to within a short distance from the top of the cylindrical block BX. This hole bears the punch, which is not represented, and is held in place in any convenient manner-say by a set-screw running through the side or the top of the block BX. Fig. 6 to be joined at its right-hand side to a slab of metal OX, fitting tightly, but so as to admit of motion up and down between the two sides of the frame X X. The righthand half of this slab CX is continued downward as far as the dotted horizontal line in the drawings, Fig. l, and forms a piston or I am now to 1 describe the apparatus of my device forpunch- This block B is seen in plunger EX, and is kept in place by the mei tallic slab, forming the plunger-cover DX, Figs. l and 6, which cover is screwed to the two respective edges of the frame X X, as shown in Figs. l and 6. In the hither and farther sides, respectively, of the frame X X is a slot at the center of the plunger EX.

Through these slots runs horizontally a pin l FX, Fig. l, passing to the outside of the frame X X on each side and moving loosely in the This pin FX passes through and is firmly i To this pin FX i is loosely attached a bar GX, Fig. l, called the i The lower end of this plunslot. attached to the plunger EX.

plun ger-bar. ger-bar is similarly attached to the upper cutter-bar P.

peration: The substance to be cut is placed between the two cutter-blades in the usual manner, and by drawing down the upper end of the upper lever Lthe upper cutter-blade T descends and performs the cutting. "When an unusually thick piece of metal is to be cut, the lower lever J isalso used, the upper -cutter-connecting bar V assisting in drawing down the upper cutter-bar P. In punching 1 holes in metal sheets or slabs the article to be punched is inserted in the open space Y, and, by the action of the leverL or of both levers, the plunger-bar GX is carried by the upper cutter-bar P downward, bearing with it the plunger E and the block BX with the punchtool, (not represented,) the lower end of which punch-tool effects the required perforation of the piece of metal operated on.

I claim-- l. The combination and arrangement of the standard and the stationary and moving cutting-blades and one or more working-levers with the punching device actuated by the same lever or levers, all substantially as shown and described.

2. The combination and arrangement of the standard, the stationary and moving cuttingblades, and the lever operated above the upj per cutting-blade, all substantially as described and shown.

3. The combination and arrangement of the standard and the two cutting-blades and the upper lever, with the subsidiary lower lever and the upper-cutter-connecting bar, all substantially as described, and shown.

4.-. The combination, with the standard and two cutting-blades, the upper blade being actuated by a lever above it, of the strengthening-bar W, attached, respectively, to the two opposing portions of the standard, all constructed and arranged substantially as shown and described.

5. The combination, with the moving half of the cutting-shears, of the bearing-pin Q and the pressure-pin S, with the slot shown in the moving blade P, all substantially as described and shown.

6. The combination and arrangement of the standard, the two cutting-blades, and the upper lever with the upper-lever holder N,

WILLIAM SMITH.

Wi tn esses: l

LEMUEL P. JENKs, Ill/l. A. GALUCIA.

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